Home / 20,409.84-30,615.14-5,618.68

Finding the Fourth Proportional to 20,409.84, 30,615.14 and 5,618.68

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Solution

The fourth proportional to 20,409.84, 30,615.14 and 5,618.68 is: 8,428.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.84 : 30,615.14 = 5,618.68 : x
  2. Step 2: Convert to fraction form
    20,409.84/30,615.14 = 5,618.68/x
  3. Step 3: Cross multiply
    20,409.84x = 30,615.14 × 5,618.68
  4. Step 4: Simplify right side
    20,409.84x = 172,016,674.82
  5. Step 5: Solve for x
    x = 172,016,674.82/20,409.84
  6. Step 6: Final answer
    x = 8,428.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.